›› 2018, Vol. 30 ›› Issue (6): 1008-1015.DOI: 10.3969/j.issn.1004-1524.2018.06.17

• Plant Protection • Previous Articles     Next Articles

Synergetic inhibition against cotton Verticillium wilt disease of arbuscular mycorrhizal fungi cooperated with Bacillus vallismortis

ZHANG Guoyi1, CHENG Lin1, HUANG Liying1, QIAN Qihui1, GUAN Linlin1, YE Wenling1, LU Hongjuan1, RAN Wei2, ZHANG Ligan1, *   

  1. 1. School of Resources and Environment, Anhui Provincial Key Laboratory of Farmland Ecological Conservation and Pollution Prevention and Control, Anhui Agricultural University, Hefei 230001, China;
    2. College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
  • Received:2017-06-05 Online:2018-06-20 Published:2018-07-02

Abstract: In the present study, the cooperative effect of arbuscular mycorrhiza fungi (AMF) Glomus versiforme and Bacillus vallismortis HJ-5 against cotton Verticillium wilt disease was explored by greenhouse pot experiment, and the possible underlying mechanisms was revealed by high performance liquid chromatography (HPLC) and tablet test. As compared with control, AMF and HJ-5 showed synergistic inhibition against Verticillium wilt disease, as the disease index was reduced by 50.82%, root weight was increased by 125.00%, and the colonization of HJ-5 in rhizosphere was enhanced by 23.80%. HPLC analysis showed that HJ-5 could produce antifungal substances, i.e. iturin A and surfactin. Dual inoculation significantly increased the concentration of iturin A and surfactin in rhizosphere than single inoculation of HJ-5 by 13.38% and 11.27%, respectively. It was hypothesized that the main mechanism of synergetic inhibition was that AMF promoted cotton root growth, helped HJ-5 colonized in rhizosphere, and produce more antifungal lipopeptides.

Key words: plant disease, economic crop, iturin A, surfactin

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